Have you tried going to your local library and checking out some of the programs they have? The ones here sometimes have like crafting and stuff for adults too in addition to children's programs. I'm lucky to live where I do in supportive housing otherwise I'd isolate completely most likely

There's sometimes social coffee events too some places like Desoxyn used to go to

Or since you play ukulele as well, maybe try looking for a local ukulele group that meets and practices together, that could give you some common interests to form more connections with people